@import url('https://fonts.googleapis.com/css2?family=Noto+Serif+KR:wght@300;400;600;700&family=Noto+Sans+KR:wght@300;400;500;700&display=swap');

:root {
  --cream: #FAF7F2;
  --warm-dark: #2C2416;
  --brown: #7A5C3A;
  --gold: #C8A96E;
  --rust: #C4623A;
  --sage: #6B8C6B;
  --light-brown: #E8DDD0;
  --mid-brown: #D4C4B0;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: 'Noto Sans KR', sans-serif;
  background: var(--cream);
  color: var(--warm-dark);
  min-height: 100vh;
}

/* ── SCREENS ── */
.screen {
  display: none;
  min-height: 100vh;
}

.screen.active {
  display: block;
}

/* ── INTRO ── */
#screen-intro {
  background: var(--warm-dark);
}

#screen-intro.active {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 40px 24px;
  position: relative;
  overflow: hidden;
}

#screen-intro::before {
  content: '';
  position: absolute;
  top: -100px;
  left: -100px;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(200, 169, 110, 0.15) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

#screen-intro::after {
  content: '';
  position: absolute;
  bottom: -80px;
  right: -80px;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(196, 98, 58, 0.1) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.intro-badge {
  font-size: 11px;
  letter-spacing: 4px;
  color: var(--gold);
  text-transform: uppercase;
  margin-bottom: 32px;
  opacity: 0.8;
}

.intro-title {
  font-family: 'Noto Serif KR', serif;
  font-size: 42px;
  font-weight: 700;
  color: var(--cream);
  line-height: 1.2;
  margin-bottom: 8px;
}

.intro-title span {
  color: var(--gold);
}

.intro-sub {
  font-size: 16px;
  color: var(--mid-brown);
  margin-bottom: 48px;
  line-height: 1.6;
}

.intro-cards {
  display: flex;
  gap: 16px;
  margin-bottom: 48px;
  flex-wrap: wrap;
  justify-content: center;
}

.intro-card {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(200, 169, 110, 0.2);
  border-radius: 12px;
  padding: 20px 24px;
  min-width: 120px;
  text-align: center;
}

.intro-card-label {
  font-size: 12px;
  color: var(--mid-brown);
}

/* ── BUTTONS ── */
.btn-primary {
  background: var(--gold);
  color: var(--warm-dark);
  border: none;
  padding: 14px 32px;
  font-size: 15px;
  font-weight: 700;
  font-family: 'Noto Sans KR', sans-serif;
  border-radius: 50px;
  cursor: pointer;
  transition: all 0.2s;
  letter-spacing: 0.5px;
}

.btn-primary:hover {
  background: #D4B87E;
  transform: translateY(-1px);
}

.btn-secondary {
  background: transparent;
  color: var(--gold);
  border: 1px solid var(--gold);
  padding: 12px 28px;
  font-size: 14px;
  font-family: 'Noto Sans KR', sans-serif;
  border-radius: 50px;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-secondary:hover {
  background: rgba(200, 169, 110, 0.1);
}

/* ── INFO FORM ── */
#screen-info.active,
#screen-child-verify.active {
  display: block;
}

#screen-info,
#screen-child-verify {
  background: var(--cream);
  padding: 40px 24px;
  max-width: 480px;
  margin: 0 auto;
}

.screen-header {
  margin-bottom: 40px;
}

.screen-header .step-label {
  font-size: 11px;
  letter-spacing: 3px;
  color: var(--brown);
  text-transform: uppercase;
  margin-bottom: 12px;
}

.screen-header h2 {
  font-family: 'Noto Serif KR', serif;
  font-size: 28px;
  font-weight: 700;
  color: var(--warm-dark);
  margin-bottom: 8px;
}

.screen-header p {
  font-size: 14px;
  color: var(--brown);
  line-height: 1.6;
}

.form-group {
  margin-bottom: 24px;
}

.form-label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--brown);
  margin-bottom: 8px;
  letter-spacing: 0.5px;
}

.form-input {
  width: 100%;
  padding: 14px 16px;
  border: 1.5px solid var(--mid-brown);
  border-radius: 10px;
  font-size: 15px;
  font-family: 'Noto Sans KR', sans-serif;
  background: white;
  color: var(--warm-dark);
  transition: border-color 0.2s;
}

.form-input:focus {
  outline: none;
  border-color: var(--gold);
}

.form-select {
  width: 100%;
  padding: 14px 16px;
  border: 1.5px solid var(--mid-brown);
  border-radius: 10px;
  font-size: 15px;
  font-family: 'Noto Sans KR', sans-serif;
  background: white;
  color: var(--warm-dark);
  cursor: pointer;
}

.form-select:focus {
  outline: none;
  border-color: var(--gold);
}

.gender-group {
  display: flex;
  gap: 10px;
}

.gender-btn {
  flex: 1;
  padding: 14px;
  border: 1.5px solid var(--mid-brown);
  border-radius: 10px;
  background: white;
  color: var(--brown);
  font-size: 15px;
  font-family: 'Noto Sans KR', sans-serif;
  cursor: pointer;
  transition: all 0.2s;
  text-align: center;
}

.gender-btn:hover {
  border-color: var(--gold);
  color: var(--gold);
}

.gender-btn.selected {
  background: var(--warm-dark);
  border-color: var(--warm-dark);
  color: var(--gold);
}

.form-actions {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-top: 32px;
}

/* ── SURVEY ── */
#screen-survey {
  background: var(--cream);
  min-height: 100vh;
}

.survey-header {
  background: var(--warm-dark);
  padding: 24px 24px 16px;
  position: sticky;
  top: 0;
  z-index: 100;
}

.survey-top {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  position: relative;
}

.survey-who {
  font-size: 13px;
  color: var(--gold);
  letter-spacing: 1px;
  font-weight: 600;
  text-align: center;
}

.page-steps {
  display: flex;
  gap: 6px;
  justify-content: center;
}

.step-bar {
  width: 14px;
  height: 4px;
  background: rgba(255, 255, 255, 0.15);
  border-radius: 10px;
  transition: all 0.3s ease;
}

.step-bar.active {
  background: var(--gold);
  width: 24px;
  box-shadow: 0 0 8px rgba(200, 169, 110, 0.4);
}

.step-bar.completed {
  background: rgba(200, 169, 110, 0.6);
}

.progress-bar {
  display: none; /* Segmented bars used instead */
}

.progress-fill {
  height: 100%;
  background: var(--gold);
  border-radius: 2px;
  transition: width 0.3s ease;
}

.survey-content {
  padding: 24px 24px 140px;
  max-width: 600px;
  margin: 0 auto;
}

#survey-questions {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.question-card {
  background: white;
  border-radius: 16px;
  padding: 20px 24px 28px;
  box-shadow: 0 2px 12px rgba(44, 36, 22, 0.06);
}

.question-text {
  font-size: 16px;
  line-height: 1.6;
  color: var(--warm-dark);
  margin-bottom: 20px;
  font-weight: 500;
  word-break: keep-all;
}

.scale-container {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.scale-labels {
  display: flex;
  justify-content: space-between;
  font-size: 11px;
  color: var(--brown);
  margin-bottom: 4px;
}

.scale-buttons {
  display: flex;
  gap: 6px;
  justify-content: space-between;
}

.scale-btn {
  flex: 1;
  aspect-ratio: 1;
  border-radius: 10px;
  border: 1.5px solid var(--mid-brown);
  background: white;
  font-size: 14px;
  font-weight: 600;
  color: var(--brown);
  cursor: pointer;
  transition: all 0.15s;
  display: flex;
  align-items: center;
  justify-content: center;
}

.scale-btn:hover {
  border-color: var(--gold);
  color: var(--gold);
}

.scale-btn.selected {
  background: var(--warm-dark);
  border-color: var(--warm-dark);
  color: var(--gold);
  transform: scale(1.05);
}

.survey-footer {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: white;
  padding: 16px 24px;
  display: flex;
  justify-content: center;
  gap: 12px;
  box-shadow: 0 -4px 20px rgba(44, 36, 22, 0.08);
  z-index: 100;
}

.survey-footer .btn-primary,
.survey-footer .btn-secondary {
  flex: 0 1 180px;
  text-align: center;
}

/* ── LOADING ── */
#screen-loading.active {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: var(--warm-dark);
  text-align: center;
  padding: 40px;
}

.loading-spinner {
  width: 60px;
  height: 60px;
  border: 3px solid rgba(200, 169, 110, 0.2);
  border-top-color: var(--gold);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin-bottom: 32px;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.loading-title {
  font-family: 'Noto Serif KR', serif;
  font-size: 22px;
  color: var(--cream);
  margin-bottom: 12px;
}

.loading-sub {
  font-size: 14px;
  color: var(--mid-brown);
  line-height: 1.6;
}

/* ── DONE / ERROR ── */
#screen-done.active,
#screen-parent-done.active,
#screen-error.active {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: var(--cream);
  text-align: center;
  padding: 40px 24px;
}

.done-icon {
  font-size: 64px;
  color: var(--sage);
  margin-bottom: 24px;
  font-weight: 700;
}

.done-title {
  font-family: 'Noto Serif KR', serif;
  font-size: 26px;
  font-weight: 700;
  color: var(--warm-dark);
  margin-bottom: 16px;
}

.done-sub {
  font-size: 15px;
  color: var(--brown);
  line-height: 1.7;
  max-width: 320px;
}

/* ── SHARE BOX ── */
.share-box {
  background: white;
  border: 1px solid var(--mid-brown);
  border-radius: 12px;
  padding: 24px;
  box-shadow: 0 4px 12px rgba(44, 36, 22, 0.04);
}

.share-box input {
  font-family: monospace;
  font-size: 13px;
  color: var(--brown);
}